Polyurethane foam

• US 11,072,704 B2
• Filed: 11/20/2015
• Issued: 07/27/2021
• Est. Priority Date: 03/20/2015
• Status: Active Grant

• Current Assignee: Inoac Corporation (Inoue Rubber Public Company Limited)
• Original Assignee: Inoac Corporation (Inoue Rubber Public Company Limited)
• Inventors: Omoto, Mitsuru, Hara, Tomotaka, Takayama, Satoshi, Hara, Takanobu
• Primary Examiner(s): Cooney, John M
• Application Number:
  US15/559,640
• Publication Number:
  US 20180340064A1
• Time in Patent Office: 2,076 Days
• CPC Class Codes: C08G 18/10 Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
• CPC Class Codes: C08G 18/2081 containing at least two non-condensed heterocyclic rings
• CPC Class Codes: C08G 18/40 High-molecular-weight compounds C08G18/2805 takes precedence
• CPC Class Codes: C08G 18/4018 Mixtures of compounds of group C08G18/42 with compounds of group C08G18/48
• CPC Class Codes: C08G 18/42 Polycondensates having carboxylic or carbonic ester groups in the main chain
• CPC Class Codes: C08G 18/4241 from dicarboxylic acids and dialcohols in combination with polycarboxylic acids and/or polyhydroxy compounds which are at least trifunctional
• CPC Class Codes: C08G 18/4837 and other oxyalkylene units
• CPC Class Codes: C08G 18/7607 Compounds of C08G18/7614 and of C08G18/7657
• CPC Class Codes: C08G 18/7621 being toluene diisocyanate including isomer mixtures
• CPC Class Codes: C08G 18/7664 containing alkylene polyphenyl groups
• CPC Class Codes: C08G 2110/0008 flexible
• CPC Class Codes: C08G 2110/0058 ≥50 and <150kg/m3
• CPC Class Codes: C08G 2110/0083 prepared using water as the sole blowing agent
• CPC Class Codes: C08G 2170/20 Compositions for hot melt adhesives
• CPC Class Codes: C08G 2350/00 Acoustic or vibration damping material
• CPC Class Codes: C08J 9/12 by a physical blowing agent
• CPC Class Codes: C08K 3/04 Carbon
• CPC Class Codes: C08K 5/34922 Melamine; Derivatives thereof
• CPC Class Codes: C08K 5/49 Phosphorus-containing compounds C08K5/0091 takes precedence
• CPC Class Codes: C08L 75/06 from polyesters

Abstract

Provided is a polyurethane foam having excellent heat resistance and the like. The polyurethane foam is obtained from a material that contains a polyol and a polyisocyanate, in which the polyol contains a polyester polyol, the polyisocyanate contains a diphenylmethane diisocyanate-based isocyanate, it is preferable that the polyester polyol has one or more side chains composed of an alkyl group, and the polyurethane foam may be used as a soundproof material for vehicles.

Claims

1. A flexible polyurethane foam obtained from a polyurethane foaming raw material containing a polyol, a polyisocyanate, a foaming agent, a catalyst, and a flame retardant, wherein

the polyol contains a polyester polyol and a mass ratio of the polyester polyol and a polyether polyol is from 100:

0 to 80;

20,

the polyisocyanate is a diphenylmethane diisocyanate-based isocyanate,

the flame retardant is composed of both of powder flame retardants of expanded graphite and a phosphorus-based powder flame retardant and the adding amount is 20 parts by mass or more and 40 parts by mass or less per 100 parts by mass of the polyol,

the flexible polyurethane foam has a density (JIS K7222;

2005) of from 80 to 94.1 kg/m³,

the flexible polyurethane foam has an isocyanate index of from 100 to 115, and

the polyester polyol is a polymerization product having an aliphatic branched glycol and an aliphatic dicarboxylic acid as constituting units.

2. The flexible polyurethane foam according to claim 1, wherein the polyester polyol has one or more side chains composed of an alkyl group.

3. The flexible polyurethane foam according to claim 1, wherein the polyol contains a polyester polyol having one or more side chains composed of an alkyl group and a polyether polyol.

4. The flexible polyurethane foam according to claim 1, wherein the polyurethane foam is composed of a slab-foamed article.

5. A vehicle comprising the flexible polyurethane foam according to claim 1 in an engine room.